de Jong D J, van der Logt E M J, van Schaik A, Roelofs H M J, Peters W H M, Naber T H J
Department of Gastroenterology and Hepatology, University Medical Centre Nijmegen, the Netherlands.
Gut. 2003 Apr;52(4):547-51. doi: 10.1136/gut.52.4.547.
Mucosal biotransformation enzymes can modify toxic compounds in the gut. As chemical or oxidative stress may be involved in the aetiology of Crohn's disease, genes encoding for enzymes involved in the prevention of such stress may be candidates for genetic susceptibility to Crohn's disease.
To assess the association of Crohn's disease with genetic polymorphisms in cytochrome P450 1A1, glutathione S-transferases mu-1, pi-1, and theta-1, and epoxide hydrolase.
chi(2) square analysis was used to compare frequencies of polymorphisms between 151 patients with Crohn's disease and 149 healthy controls.
In patients, a genetic polymorphism in exon 3 of the microsomal epoxide hydrolase gene was distributed significantly different compared with controls (chi(2)=23.7; p<0.0001). All other polymorphisms tested were equally distributed between patients and controls.
Microsomal epoxide hydrolase may play a role in the pathophysiology of Crohn's disease. Furthermore, the epoxide hydrolase gene is located on chromosome 1q, close to a region previously linked to Crohn's disease.
黏膜生物转化酶可改变肠道中的有毒化合物。由于化学或氧化应激可能参与克罗恩病的病因学,编码参与预防此类应激的酶的基因可能是克罗恩病遗传易感性的候选基因。
评估克罗恩病与细胞色素P450 1A1、谷胱甘肽S-转移酶μ-1、π-1和θ-1以及环氧化物水解酶基因多态性之间的关联。
采用卡方分析比较151例克罗恩病患者和149例健康对照者之间多态性的频率。
患者中,微粒体环氧化物水解酶基因外显子3的基因多态性分布与对照相比有显著差异(卡方=23.7;p<0.0001)。所有其他检测的多态性在患者和对照之间分布相同。
微粒体环氧化物水解酶可能在克罗恩病的病理生理学中起作用。此外,环氧化物水解酶基因位于1号染色体q上,靠近先前与克罗恩病相关的区域。